Legal claims defining the scope of protection. Each claim is shown in both the original legal language and a plain English translation.
1. A method for transmitting and receiving a vehicle to everything (V2X) message of a first road side unit (RSU) in a wireless communication system, the method comprising: transmitting, by the first RSU to an Intelligent Transportation System (ITS) server, PC5 interface congestion related information; receiving by the first RSU, a first V2X message after transmitting the PC5 interface congestion related information; and broadcasting by the first RSU, a second V2X message on a basis of the first V2X message, wherein the second V2X message indicates that the second V2X message is control information, via a packet data convergence protocol (PDCP) service data unit (SDU), wherein the first RSU is selected by the ITS server to transmit the second V2X message including an information for reducing a V2X message transmission interval of a user equipment (UE), wherein the ITS server selects the first RSU based on a location determined from the PC5 interface congestion related information.
This invention relates to vehicle-to-everything (V2X) communication in wireless systems, specifically addressing congestion management in PC5 interfaces used for direct communication between roadside units (RSUs) and user equipment (UEs). The problem solved is the inefficient transmission of V2X messages due to congestion, which can degrade communication reliability and increase latency. The method involves a first RSU transmitting PC5 interface congestion-related information to an Intelligent Transportation System (ITS) server. The ITS server analyzes this data to determine the optimal RSU for managing congestion, selecting the first RSU based on its location relative to the congestion area. The first RSU then receives a first V2X message from the ITS server and broadcasts a second V2X message derived from it. The second message is marked as control information via a PDCP service data unit (SDU) and includes instructions to reduce the V2X message transmission interval of UEs, helping alleviate congestion. The ITS server's selection of the RSU ensures targeted and efficient dissemination of congestion-mitigation commands. This approach improves V2X communication efficiency by dynamically adjusting message transmission rates based on real-time congestion data.
2. The method according to claim 1 , wherein the second V2X message indicates control information by using ‘V2X control’ as a PDCP SDU type.
A method for enhancing vehicle-to-everything (V2X) communication involves transmitting control information within V2X messages using a specific Packet Data Convergence Protocol (PDCP) Service Data Unit (SDU) type. The method addresses the need for efficient and standardized transmission of control data in V2X networks, ensuring compatibility and reliability in communication between vehicles and infrastructure. The control information is embedded in a second V2X message, distinct from a first V2X message that may carry user data or other payloads. By designating ‘V2X control’ as the PDCP SDU type for the second message, the system ensures that control data is properly identified and processed by receiving entities. This approach streamlines communication protocols, reduces overhead, and improves the efficiency of V2X networks by clearly distinguishing control information from other types of data. The method supports seamless integration with existing V2X frameworks, enhancing overall system performance and reliability in vehicular communication environments.
3. The method according to claim 1 , wherein the second V2X message uses ‘V2X-non-IP’ as a PDCP SDU type, and indicates control information by using one or more of source Layer-2 ID and destination Layer-2 ID as a preset value.
This invention relates to vehicle-to-everything (V2X) communication systems, specifically addressing the efficient transmission of control information in non-IP (Internet Protocol) based V2X messages. In V2X networks, vehicles and infrastructure exchange data for safety and traffic management, but existing methods often rely on IP-based protocols, which introduce overhead and complexity. The invention improves upon this by using a 'V2X-non-IP' protocol data unit (PDCP SDU) type for control information, reducing latency and resource usage. The method leverages Layer-2 identifiers (source and destination Layer-2 IDs) as preset values to encode control information, eliminating the need for additional signaling. By embedding control data within these identifiers, the system streamlines communication while maintaining compatibility with existing V2X frameworks. This approach is particularly useful for time-sensitive applications like collision avoidance, where low-latency and minimal overhead are critical. The invention ensures reliable delivery of control messages without the inefficiencies of IP-based protocols, enhancing overall system performance in V2X environments.
4. The method according to claim 2 , wherein the PDCP SDU type is not retransmitted by a UE that has received ‘V2X control’ information.
This invention relates to wireless communication systems, specifically to methods for handling Protocol Data Conduit (PDCP) Service Data Units (SDUs) in vehicle-to-everything (V2X) communications. The problem addressed is the inefficient retransmission of certain PDCP SDUs by user equipment (UE) when receiving V2X control information, which can lead to unnecessary resource consumption and delays in critical V2X communications. The method involves a UE receiving V2X control information, which may include instructions or parameters for managing V2X communications. Upon receiving this control information, the UE identifies PDCP SDUs of a specific type that should not be retransmitted. This prevents the UE from unnecessarily retransmitting these SDUs, optimizing network resources and reducing latency in V2X communications. The method ensures that only relevant data is retransmitted, improving the efficiency and reliability of V2X services, such as vehicle safety and traffic management applications. The solution is particularly useful in scenarios where timely and accurate communication between vehicles and infrastructure is critical.
5. The method according to claim 2 , wherein the second V2X message is retransmitted by a second RSU that has received the second V2X message if the PDCP SDU type corresponds to ‘V2X control’, a preset condition.
This invention relates to vehicle-to-everything (V2X) communication systems, specifically improving reliability for control messages in vehicular networks. The problem addressed is ensuring timely and reliable delivery of V2X control messages, which are critical for safety and coordination in connected vehicle environments. The method involves retransmitting a second V2X message by a second Roadside Unit (RSU) under specific conditions. The second V2X message is retransmitted if its Packet Data Convergence Protocol (PDCP) Service Data Unit (SDU) type is classified as ‘V2X control’ and a preset condition is met. This ensures that control messages, which are essential for real-time vehicle coordination, are reliably propagated even if the original transmission fails. The preset condition may include factors such as signal strength, network congestion, or message priority. By leveraging multiple RSUs for retransmission, the system enhances message delivery robustness, reducing the risk of communication failures in dynamic vehicular environments. This approach is particularly useful in scenarios where direct vehicle-to-vehicle communication is unreliable, such as in dense traffic or obstructed areas. The method improves overall system reliability and safety by prioritizing critical control messages.
6. The method according to claim 5 , wherein the preset condition is a V2X message transmission control location information and a V2X message transmission control time information.
This invention relates to vehicle-to-everything (V2X) communication systems, specifically addressing the challenge of efficiently controlling the transmission of V2X messages to optimize network performance and resource utilization. The method involves dynamically adjusting V2X message transmission based on predefined conditions, including location and time information, to ensure timely and relevant data exchange between vehicles and infrastructure. The system determines a transmission control location, which specifies geographic areas where V2X messages should be transmitted or suppressed, and a transmission control time, which defines specific time intervals for message transmission. By integrating these parameters, the method ensures that V2X messages are only sent when and where they are most needed, reducing unnecessary communication overhead and improving overall system efficiency. This approach is particularly useful in dense traffic scenarios or areas with limited network capacity, where selective message transmission helps prevent congestion and enhances reliability. The method may also involve receiving V2X messages from other vehicles or roadside units, analyzing their content, and determining whether they meet the preset location and time conditions before transmission. This ensures that only relevant and time-sensitive information is propagated, further optimizing bandwidth usage and reducing latency. The system may also adapt the transmission parameters in real-time based on changing environmental conditions or network demands, ensuring continuous optimization of V2X communication performance.
7. The method according to claim 6 , wherein the V2X message transmission control location information is one of geographical location information, administrative district information, public land mobile network (PLMN), tracking area, tracking area list, cell unit location information, eNodeB unit location information, service area unit location information of eNodeB, V2X-Multi-eNodeB Control Entity (MeCE) unit location information, mobile management entity (MME) unit location information, or service area unit location information of an MME.
This invention relates to vehicle-to-everything (V2X) communication systems, specifically addressing the need for precise control of V2X message transmission based on location information. The technology aims to optimize communication efficiency and reliability by dynamically adjusting message transmission parameters according to the geographical or administrative context in which the communication occurs. The method involves determining a transmission control location for V2X messages, which can be defined using various types of location data. These include geographical coordinates, administrative district identifiers, public land mobile network (PLMN) identifiers, tracking areas, cell unit locations, eNodeB (base station) locations, service areas of eNodeB units, V2X-Multi-eNodeB Control Entity (MeCE) locations, mobile management entity (MME) locations, or service areas of MME units. By leveraging these location-based parameters, the system can adapt message transmission strategies to ensure optimal performance in different network environments. The method ensures that V2X communications are managed efficiently, reducing unnecessary transmissions and improving resource utilization. This approach is particularly useful in scenarios where vehicles and infrastructure devices need to communicate reliably across diverse network conditions. The use of multiple location-based identifiers allows for flexible and scalable deployment of V2X services, enhancing overall system robustness.
8. The method according to claim 1 , wherein the first RSU is selected as an RSU which will be used for the second V2X message transmission.
This invention relates to vehicle-to-everything (V2X) communication systems, specifically improving message transmission reliability in dynamic environments. The problem addressed is ensuring efficient and reliable communication between vehicles and roadside units (RSUs) in scenarios where network conditions or vehicle movement may disrupt message delivery. The method involves selecting a first RSU for initial V2X message transmission and then determining whether the same or a different RSU should be used for subsequent message transmissions. The selection process considers factors such as signal strength, network congestion, and vehicle mobility to optimize communication efficiency. If conditions change, the system dynamically re-evaluates and may switch to a second RSU for the next transmission, ensuring continuous and reliable data exchange. The invention also includes mechanisms to prioritize RSUs based on their ability to maintain stable connections, reducing latency and improving overall system performance. By dynamically adjusting RSU selection, the method enhances V2X communication reliability in real-time, particularly in high-mobility or congested network scenarios. This approach is particularly useful for safety-critical applications where uninterrupted communication is essential.
9. The method according to claim 1 , wherein the first V2X message is transmitted in a unicast mode.
A method for vehicle-to-everything (V2X) communication involves transmitting a first V2X message in a unicast mode, where the message is directed to a specific recipient rather than broadcast to multiple devices. This method is part of a broader system for enhancing communication between vehicles and other entities, such as infrastructure, pedestrians, or other vehicles, to improve safety, efficiency, and coordination in transportation networks. The unicast transmission ensures that the message is delivered directly to a targeted device, reducing unnecessary data dissemination and optimizing network resources. This approach is particularly useful in scenarios where precise, one-to-one communication is required, such as in collision avoidance systems, traffic management, or emergency vehicle coordination. The method may also include additional steps, such as determining the recipient of the unicast message based on predefined criteria, such as proximity, priority, or type of communication. By using unicast transmission, the system ensures that critical information is delivered efficiently and reliably to the intended recipient, minimizing latency and improving overall communication performance in V2X environments.
10. The method according to claim 1 , wherein the second V2X message is transmitted on a PC5 interface channel.
This invention relates to vehicle-to-everything (V2X) communication systems and addresses the need for efficient and reliable message exchange between vehicles and their surroundings. Specifically, it concerns a method for transmitting V2X messages. The method involves receiving a first V2X message. Subsequently, a second V2X message is transmitted. The core of this specific embodiment is that the second V2X message is transmitted using the PC5 interface channel. The PC5 interface is a direct communication interface between user equipment (e.g., vehicles) in a cellular network, enabling device-to-device communication without necessarily involving the network infrastructure. This allows for low-latency communication, which is critical for safety-related V2X applications such as collision avoidance and traffic hazard warnings. By utilizing the PC5 interface for the second V2X message, the system can achieve faster message delivery and potentially reduce network congestion compared to relying solely on network-based interfaces.
11. The method according to claim 1 , wherein the PC5 interface congestion related information is transmitted through a Packet Data Network (PDN) connection in a unicast mode.
This invention relates to wireless communication systems, specifically addressing congestion management in Proximity Services (ProSe) direct communication over the PC5 interface. The PC5 interface enables direct device-to-device communication without relying on a cellular network, but congestion can occur when multiple devices attempt to communicate simultaneously. The invention improves congestion control by transmitting PC5 interface congestion-related information through a Packet Data Network (PDN) connection in unicast mode. This ensures reliable delivery of congestion data to individual devices, allowing them to adjust their communication parameters dynamically. The method involves monitoring congestion levels, generating relevant information, and transmitting it via a dedicated PDN connection to avoid overloading the direct PC5 link. By using unicast transmission, the system ensures that each device receives precise congestion updates tailored to its specific communication needs, enhancing overall network efficiency and reducing interference. The invention is particularly useful in scenarios with high device density, such as public safety or large-scale IoT deployments, where efficient congestion management is critical for maintaining reliable direct communication.
12. A first RSU for transmitting and receiving a vehicle to everything (V2X) message in a wireless communication system, the first RSU comprising: a transceiving module; and a processor, wherein the processor causes the transceiving module to: transmit, to an ITS server, PC5 interface congestion related information, receive a first V2X message after transmitting the PC5 interface congestion related information, and broadcast a second V2X message on a basis of the first V2X message, wherein the second V2X message indicates that the second V2X message is control information, via a packet data convergence protocol (PDCP) service data unit (SDU), wherein the first RSU is selected by the ITS server to transmit the second V2X message including an information for reducing a V2X message transmission interval of a user equipment (UE), wherein the ITS server selects the first RSU based on a location determined from the PC5 interface congestion related information.
This invention relates to a roadside unit (RSU) in a wireless communication system that manages vehicle-to-everything (V2X) message transmission to mitigate PC5 interface congestion. The RSU includes a transceiving module and a processor that coordinates message handling. The processor transmits PC5 interface congestion data to an Intelligent Transportation System (ITS) server, receives a first V2X message from the server, and broadcasts a second V2X message derived from the first message. The second message is marked as control information via a Packet Data Convergence Protocol (PDCP) Service Data Unit (SDU) and includes instructions to reduce the V2X message transmission interval of user equipment (UE). The ITS server selects the RSU based on its location, determined from the congestion data, to optimize message dissemination and alleviate network congestion. This approach ensures efficient V2X communication by dynamically adjusting message intervals and leveraging server-based RSU selection for targeted congestion management.
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June 16, 2020
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